<span> 3(2х - 1) < 5,4 - х
6x-3<5.4-x
7x<8.4
x<1.2
число 1</span>
(x-306/100)*265/100=424/100
(x-306/100)*265=424
x-306/100=424/265
x=
424/265+306/100=
6x^2+1>5x-x^2/4
24x^2+4>20x-x^2
25x^2-20x+4>0
x= (10+- sqrt(100-100))/25= 0,4.
Ответ: x<0,4.
(5x-19)(5x×19)=100+19x
(5x-19)(5x×19)-19x=100
5x×(5x×19)-19x=119
5x×95x-19x=119
5x×76x=119
X=-130,5